当螺丝刀就位后，拆卸图f中的E夹和连接结构部件的销钉，则止回阀阀瓣将在没有张力的情况下开启。
When the screwdriver is in place, remove the E-clip (Figure F) and pin connecting the structural members and the check clapper will open with no tension.
该大厦全部采用我公司生产的对夹蝶阀、蝶式止回阀。
This mansion adopts our wafer butterfly valves and check valves wholly.
对夹止回阀是用于防止管道和设备使用中介质倒流的一种 阀门；
Wafer swing check valve is used to prevent media from flowing backwards in pipeline and device ;
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